COMPOSICIÓN QUÍMICA= Chemical composition: Also abstracted in Chem. Centr., 1892, ii, 793. The author has isolated bornyl acetate from the ethereal oil of Abies sibirica, of which it forms 30 per cent.; this oil is therefore the best material for the preparation of borneol. The substance which Spehr obtained from oil of pine needles, and described as a terpene hydrate, is in reality bornyl acetate. The ethereal oil of Abies pectinata also contains bornyl acetate, which may also be assumed to be present in oil of Pinus canadensis.

The present invention concerns the use of (i) finely divided knotwood; or (ii) an ext., obtained by extg. knotwood with a polar solvent and recovering the ext., as an antioxidative agent. Furthermore, the invention also relates to the use of a fraction of said ext. as an antioxidative agent. Knotwood species were extd. with lypophilic and hydrophilic solvents and exts. were dried. Inhibition of lipid peroxidn. and in vitro scavenging of superoxide radicals by the exts. are shown. ]]>1) CONSELL, Danilo M. Enciclopedia de plantas que curan. Buenos Aires: Ediliba, 1987. 2 volúmenes. p. 5.